You do realize that those that cheat or mod would not care about this and may actually like this. It would not be a punishment to them at all. All this would do is give them free regin and even more reason to continue doing what they do. Which is not fixing the problem in any way or form but actually feeding the problem and making it worse.

I'd be more than happy for them to have their own lobbies, then I wouldn't have to put up with the under mappers and rock glitchers, and IW/Treyarch would not have to work to patch them and could spend their time doing something else more usefull

Yes it would remove them from normal lists, but would not remove the problem itself. The problem is the developers need open beta's of the game so these things can be found and patched before the game is released.

True, because they do not want to risk people getting free play on the game and then not buying it maybe. Or having pre knoledge about guns and maps and releasing it through yt thus destroying any hype they try to generate about the game.

Strangely enough BF had one and all it did was make the game better by the time it was released. Helped fix some of the problems that some of guns had.

Then again if they started using open beta's then they would not need beta testers as much and could cut them out of the credits and pay.

Eh, until they have open beta's this franchise is always going to end up with problems like this game has.